Golden Alga Bloom Reports

Please note: Evidence of a golden alga-related fish kill is often difficult to track. Large numbers of small fish may be killed. Predators such as birds and raccoons may eat larger dead fish before they are observed or counted. Also, dead fish quickly sink below the surface, which interferes with counts. Estimates of numbers killed are only as good as the evidence available on the scene. The public is asked to report dead or dying fish and wildlife as soon as possible to TPWD's 24-hour communications centers at 512-389-4848 (Austin) or 281-842-8100 (LaPorte).

Texas River Basins Map
June 28, 2017 – Colorado River Basin
Concho River – A water sample from Mullins Crossing had no detectable P. parvum cells. A sample from the Concho River near Paint Rock, TX had low algal concentrations and was not considered toxic to fish.
Lake O.H. Ivie – Water samples from near the confluences of the Concho and Colorado Rivers in Lake O.H. Ivie had low to moderate algal concentrations and were not considered toxic to fish.
June 24, 2017 – Red River Basin
Lake Texoma – Water samples from Paradise Cove and the Hagerman National Wildlife Refuge contained moderate concentrations of P. parvum cells and were classified as highly toxic to fish. On June 20, TPWD received notification of a fish kill in the Big Mineral Arm of Lake Texoma related to this golden alga bloom. The fish affected by the algal bloom included shad, crappie and freshwater drum.
June 5, 2017 – Colorado River Basin
Concho River – The Concho River down to Lake O.H. Ivie has been experiencing a golden alga bloom since March. Water samples collected from the FM 1692 and Mullins Crossings had high concentrations of P. parvum cells and were considered highly toxic to fish. A water sample from Veribest Park in Veribest, TX, contained a moderate concentration of P. parvum cells and was classified as moderately toxic to fish.
May 31, 2017 – Colorado River Basin

Lake O.H. Ivie – A water sample downstream from the Colorado and Concho river confluence had a low concentration of P. parvum cells but was classified as highly toxic to fish. Water samples from the Colorado and Concho river arms contained no detectable P. parvum cells. A sample from the Abilene Pump Station contained a low density of P. parvum cells that was classified as slightly toxic to fish.

May 10, 2017 – Colorado River Basin

Lake O.H. Ivie has been experiencing an ongoing fish kill since March 6 due to a golden alga bloom. Fishes affected include Longnose Gar, Gizzard Shad, Smallmouth Buffalo, White Crappie, Black Crappie, and Blue Catfish. A water sample from the confluence of the Concho and Colorado Rivers contained low densities of P. parvum cells but was classified as highly toxic to fish. A sample from the Abilene Pump Station contained moderate concentrations of P. parvum cells and was classified as highly toxic to fish. Samples upstream of the reservoir in both the Concho and Colorado river arms contained high densities of P. parvum cells and were classified as highly toxic to fish.
Colorado River – A water sample at the US 67 Crossing contained no detectable P. parvum cells.
Elm Creek – A sample collected from the low water crossing of Elm Creek in Ballinger contained a moderate concentration of P. parvum cells and was classified as highly toxic to fish. TPWD received notification of a fish kill downstream of the confluence of Elm Creek and the Colorado River. Approximately 25 to 30 fish of various species were killed as a result of this golden alga bloom.

April 30, 2017 – Colorado River Basin
Lake O.H. Ivie – Lake O.H. Ivie has been experiencing an ongoing fish kill since March 6, 2017 due to a golden alga bloom. An estimated 2,600 fish, including Longnose Gar, Gizzard Shad, Smallmouth Buffalo, White Crappie, Black Crappie, and Blue Catfish have been killed in this event. The fish kill is mostly confined to the Concho River Arm of the lake. On April 24, TPWD fisheries biologists took water samples from the area where the fish kill is occurring. The water had a moderate density of P. parvum cells and was considered highly toxic to fish.
April 24, 2017 – Rio Grande Basin
Lake Ascarate – Lake Ascarate in El Paso has been experiencing an ongoing fish kill since mid-April. Several hundred bass, catfish, and sunfish have been reported killed in this event. TPWD fisheries biologists took water samples to test for golden alga on April 24, 2017. The water samples had no detectable P. parvum cells. Biologists suspect the cause of the fish kill to be the result of low dissolved oxygen concentrations and/or disease.
March 8, 2017 – Brazos River Basin
Lake Granbury – A water sample from the US Business 377 Crossing contained no detectable P. parvum cells. A water sample from the FM 51 Crossing contained low concentrations of P. parvum cells and was not considered toxic to fish.
March 6, 2017 – Colorado River Basin
Lake O.H. Ivie – A water sample collected from the mouth of the Colorado River in Lake O.H. Ivie contained a moderate concentration of P. parvum cells and was classified as highly toxic to fish.  A fish kill related to this golden algae bloom at the mouth of the Colorado River was reported to Texas Parks and Wildlife Department on March 19th.  The fish kill in this area is ongoing as of April 7, 2017 and includes gar and channel catfish.
March 2, 2017 – Brazos River Basin
Possum Kingdom Lake – A water sample collected at the dam contained no detectable P. parvum cells. Water samples collected from the FM 51 Crossing, Sandy Beach, and Deep Elm Arm all contained low concentrations of P. parvum cells. The samples from the FM 51 crossing and Deep Elm Arm were not considered toxic, while the Sandy Beach sample was classified as slightly toxic to fish.
February 27, 2017 – Colorado River Basin
Lake Colorado City – A water sample collected from the Lake Colorado City State Park contained a low density of P. parvum cells and was not considered toxic to fish.
Moss Creek Lake – A water sample collected from the boat ramp had no detectable P. parvum cells.
Lake E.V. Spence – A water sample collected from Wildcat Creek had no detectable P. parvum cells.
Champion Creek Reservoir – A water sample from Champion Creek Reservoir had no detectable P. parvum cells.
Brady Creek Reservoir – A water sample from Brady Creek Reservoir had no detectable P. parvum cells.
February 8, 2017 – Brazos River Basin
Hubbard Creek Lake – Water samples from the boat ramp and the US Hwy 180 Bridge had no detectable P. parvum cells.
Lake Stamford – Water samples from the Marina Boat Ramp and the Anchor Boat Ramp had no detectable P. parvum cells.
North Anson Lake – A water sample from the boat ramp had no detectable P. parvum cells.
Lake McCarty – A water sample from the boat ramp had no detectable P. parvum cells.
February 7, 2017 – Brazos River Basin
Lake Sweetwater – A water sample collected from the boat ramp at Lake Sweetwater contained a low density of P. parvum cells and was classified as slightly toxic to fish.
Kirby Reservoir – A water sample collected from the boat ramp at Kirby Reservoir had no detectable P. parvum cells.
February 4, 2017 – Colorado River Basin
Elm Creek – A water sample from Elm Creek Lake in Ballinger had a moderate density of P. parvum cells and was classified as highly toxic to fish. TPWD biologists discovered a fish kill consisting of approximately 200 bass, crappie, sunfish, and catfish attributed to a golden algae bloom.
Beal Park Pond - A water sample from Beal Park Pond in Midland had a low density of P. parvum cells and was not considered toxic to fish.
CJ Kelly Pond -A water sample from C.J. Kelly Park in Midland had no detectable P. parvum cells. 
February 2, 2017 – Brazos River Basin
Lake Granbury – Water samples from the US Business 377 Bridge, The FM 51 Bridge, and the dam had no detectable P. parvum cells.
February 1, 2017 – Brazos River Basin
Possum Kingdom – Water samples from the dam, the FM 51 Bridge, Sandy Beach, and Deep Elm had no detectable P. parvum cells.
January 23, 2017 – Colorado River Basin
Beal Park Pond – A water sample from Beal Park Pond in Midland, TX contained a low density of P. parvum cells and was not considered toxic to fish.
CJ Kelly Pond - A water sample from C.J. Kelly Park in Midland, TX had no detectable P. parvum cells. 
January 12, 2017 – Brazos River Basin
Possum Kingdom – Water samples from the dam, the FM 51 Bridge, Sandy Beach, and Deep Elm had no detectable P. parvum cells.
January 10, 2017 – Brazos River Basin
Hubbard Creek Reservoir – Water samples collected from the boat ramp and Highway 180 Bridge had no detectable P. parvum cells.
January 9, 2017 – Brazos River Basin
Lake Sweetwater – A water sample collected from the boat ramp on Lake Sweetwater had a moderate concentration of P. parvum cells and was classified as highly toxic to fish.  A golden algae bloom is suspected to have caused a small fish kill consisting of carp and black bullhead catfish.
Lake Stamford – Water samples collected near Anchor Ramp and the marina boat ramp had no detectable P. parvum cells.
North Anson Lake – A water sample from the boat ramp had low concentrations of P. parvum cells and was classified as slightly toxic to fish.
Kirby Reservoir – A water sample collected from the boat ramp had no detectable P. parvum cells.
Lake McCarty – A water sample collected from the boat ramp had no detectable P. parvum cells.
January 5, 2017 – Colorado River Basin
Beal Park Pond – A water sample from Beal Park in Midland had low amounts of P. parvum cells and was classified as moderately toxic to fish.
C.J. Kelly Pond – A water sample from C.J. Kelly Park in Midland had no detectable P. parvum cells.
Comanche Trails Park – A water sample from Comanche Trails Park in Odessa had no detectable P. parvum cells.
January 4, 2017 – Rio Grande Basin
Ascarate Lake – Water samples from the south end and middle of the lake had no detectable P. parvum cells A water sample from the North end of the lake had low amounts of P. parvum cells and was classified as non-toxic to fish.
January 3, 2017 – Brazos River Basin
Lake Granbury – Water samples from the FM 51 Bridge and the dam had no detectable P. parvum cells. A water sample from the US Business 377 Bridge had low amounts of P. parvum cells and was classified as non-toxic to fish.
December 2, 2016 – Brazos River Basin
Lake Granbury – Water samples from DeCordova, the FM 51 Bridge, and US Bus 377 detected no P. parvum cells.

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Take Action
  • Report Kills - If you see a fish kill or suspect golden alga, contact one of TPWD's 24-hour communications centers at 512-389-4848 (Austin) or 281-842-8100 (La Porte).
  • Get the Facts - TPWD has collaborated with the Texas Commission on Environmental Quality and other entities to produce a golden alga information card. Download a PDF from the TCEQ website or request a free hard copy from TPWD at hab@tpwd.texas.gov.